Check your settings

If the flash isn’t working, or it goes off every time you take a photo, check your flash settings. Open the Camera app and tap , in the upper left of the screen, to choose a different setting.

If your device is very warm or cold

If you take extended video with the flash on, or you’re using the device in a very warm environment, you might see a message that says the flash is disabled. The message remains until your device cools down.

If your device's battery level is low and your device is very warm or cold, the camera flash and the flashlight might not work. These features will work again when you charge your device and return it to a more normal temperature.